алгебра 10 класс sin 9x sin 3x=1/2cos6x - №23456565

алгебра 10 класс
sin 9x sin 3x=1/2cos6x
- Предмет:
  Алгебра
- Автор:
  kaylie
- 5 лет назад

Ответы 1

1/2(cos6x-cos12x)=1/2cos6x 1/2cos6x-1/2cos12x=1/2cos6x -1/2cos12x=0 cos12x=0 12x=П/2+Пkx=П/24+Пk/12
- Автор:
  duncegsq4
- 1 год назад
- 10
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